Conservative fitment questions

[MatthewMenze]

Hello all,

I have been researching this extensively over the last week or so, but would like some first hand input to back up my own findings. I am looking to buy new summer rims (currently only have ratty winter steelies) for my 2012 Yaris, as well as lower it with Tein S-Tech (unless there is a better option).

I am looking at getting a set of DOT-Approved Diamond Racing Wheels Smoothies for my summer rims, I have always loved how odd smooth steelies look on a car, and the price is similar to random rims off tire rack: http://www.diamondracingwheels.com/i...smoothie-wheel

I have found a number of people that have run them with a large amount of offset, but few they have set them up with near-stock offset. I am looking to keep similar fitment to stock, though it looks like I will need slightly more offset due to the offsets they offer being slightly outside of the stock ET38.

My plan is to get them in either 15 or 16 inch, while also lowering my Yaris with Tein S-Techs, and my goal is to have zero issues with rubbing while turning and similar. It is my DD, so I am not super worried about ultimate handling performance...Just trying to get my desired aesthetic and drive normally with this build.

The specific questions I have are:

• Does anyone have ballpark numbers for the amount of offset I should shoot to stay under to avoid issues with a moderately lowered Yaris? I assume near stock is ideal, but I would like to know how much breathing room I have.
• Is there any specific advantage of either 15" or 16" wheels besides aesthetics and tire availability when lowering a Yaris? IE, will I avoid some issue with one size or another as far as rubbing or similar.
• Is there a preferred rim width I should target when lowering a Yaris? Otherwise I will stay similar to stock width.
• I have seen some mixed opinions on if Diamond Racing measures offset in ET or backspacing, does anyone know (I will be calling them as well)?
• Any other issues I should consider?

Thanks,
Matt